2. Edit the form as needed.
3. Use the mouse to select the required cell, click Start, click Conditional Format, and then select New Rule.
4. Open the New Format Rule window, click the cell where you want to format the formula, enter the formula in the box below: =A3 "",and then click Format.
5. Open the Cell Format window, click the border, select the outer border, and then click OK.
6. In this way, if you enter any data in the cell, the cell will automatically add a border; Cancel the data, and then cancel the border. Making inductive tables in Excel tables.